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Finding the Fourth Proportional to 12,454,938.60, 18,682,407.90 and 7,647,037.80

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Solution

The fourth proportional to 12,454,938.60, 18,682,407.90 and 7,647,037.80 is: 11,470,556.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,454,938.60 : 18,682,407.90 = 7,647,037.80 : x
  2. Step 2: Convert to fraction form
    12,454,938.60/18,682,407.90 = 7,647,037.80/x
  3. Step 3: Cross multiply
    12,454,938.60x = 18,682,407.90 × 7,647,037.80
  4. Step 4: Simplify right side
    12,454,938.60x = 142,865,079,406,318.59
  5. Step 5: Solve for x
    x = 142,865,079,406,318.59/12,454,938.60
  6. Step 6: Final answer
    x = 11,470,556.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.